Abstract:
WHEREIN R is alkyl having 1 to 4 carbon atoms and R2 is defined above, with a thioalkanoic acid of the formula
WHEREIN R1 is a linear alkyl having 1 to 4 carbon atoms and R2 is hydrogen or methyl comprising the steps reacting a compound of the formula The present invention relates to a process for the preparation of steroidal spirolactones having the formula
Abstract:
Process for the preparation of vincamine wherein eburnamonine is reacted with an ethynylmagnesium halide to give (20 Alpha ,21 Alpha ) 16 Alpha -ethynyl eburnane 16 Beta -ol, which upon oxidation to vincaminic acid and subsequent methylation provides vincamine. The optically active forms of vincamine can be obtained by using an optically active form of eburnamonine.
Abstract:
WHEREIN R is selected from the group consisting of hydrogen and alkyl of 1 to 7 carbon atoms, R1 is selected from the group consisting of hydrogen and carbalkoxy of 1 to 7 alkyl carbon atoms, R2 is selected from the group consisting of hydrogen, carboxy and carbalkoxy of 1 to 7 alkyl carbon atoms, R3 is selected from the group consisting of hydrogen and Alpha tetrahydropyranyl, m is 3,4 or 5 and n is 2,3 or 4 with the proviso that when R1 is carbalkoxy, R is alkyl of 1 to 7 carbon atoms, R2 is hydrogen and R3 is Alpha -tetrahydro pyranyl; when R2 is carbalkoxy, R is alkyl of 1 to 7 carbon atoms, R1 is hydrogen and R3 is Alpha -tetrahydropyranyl and when R2 is carboxy, R and R1 are hydrogen and R3 is Alpha tetrahydropyranyl, which possess the physiological activity of prostaglandins, and salts thereof when R, R1, R2 and R3 are hydrogen, with non-toxic, pharmaceutically acceptable bases and their preparation.
Abstract:
1. A METHOD OF INCREASING THE CALIBER OF EGGS OF POULTRY COMPRISING ORALLY ADMINISTERING TO EGG LAYING POULTRY AN AMOUNT EFFECTIVE TO INCREASE THE CALIBER OF EGGS OF AT LEAST ONE ACTIVE COMPOUND OF THE FORMULA
WHEREIN R IS LOWER ALKYL OF 1 TO 6 CARBON ATOMS AND R'' IS SELECTED FROM THE GROUP CONSISTING OF ALLYL, 2-METHYLALLYL, 2-BUTENYL, TRIFLUOROVINYL, ETHYNYL, PROPARGYL, PROPYNYL CHLOROETHYNYL BUTADIYNYL AND CYCLOPROPYL.
Abstract:
1. A PROCESS FOR THE CLEAVAGE OF A THIOKETAL COMPRISING REACTING A THIOKETAL WITH AN ALKYLATING AGENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL HALIDE OF 1 TO 7 CARBON ATOMS AND BENZYL HALIDE IN THE PRESENCE OF WATER TO OBTAIN THE CORRESPONDING CARBONYL DERIVATIVE.
Abstract:
WHEREIN N IS O OR 1 AND ESPECIALLY THE Z ISOMERS WHICH HAVE REMARKABLE INSECTICIDAL PROPERTIES AND ARE INTERMEDIATES IN THE SYNTHESIS OF JUVENILE HORMONE AND THEIR PREPARATION. THIOPYRAN
WHEREIN R1 IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL OF 1 TO 7 CARBON ATOMS AND PHENYL, R2 IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, CHLORINE, BROMINE AND LOWER ALKYL OF 1 TO 7 CARBON ATOMS AND N IS 3 OR 4 WHICH HAVE HERBICIDAL ACTIVITY AND THEIR PREPARATION AND INTERMEDIATES THEREFOR.
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